The present invention relates to methods of dyeing the hair with oxidative dyes devoid of p-ph enylenediamine and p-toluenediamine and containing N,N-bis(2-hydroxyethyl)-p-phenylenediamine, p-aminophenol, 4-amino-m-cresol, hydroxyethyl-p-phenylenediamine, 1-hydroxyethyl-4,5-diamino pyrazole, 4-chlorine-resorcinol, 2-methylresorcinol, 2,4-diaminophenoxyethanol and 2-amino-3-hydroxypyridine, which possess an improved sensitising power and can be used in mixtures of the various shades with predictable results.
